Electric arc lamp



3 Sheets-Sheet 1.

Patented Nov. 24, 1896.

(No Model.)

G, R. LEAN.

ELECTRIC ARC LAMP.

ma m d A IIII1 Aa `(No Model.) v G R LEAN 3 Sheets-Sheet 2.

ELECTRIC ARC LAMP.

No. 571,974. Patented Nov, 24, 1896.

(No Model.) 3 Sheets-Sheet 3.

G. R. LEAN.

ELECTRIC ARG LAMP.

No. 571,974 Patented NOV, 24, 1896.

wgzsszs l Q UNITED STATES PATENT OEEicE.

GEORGE It. LEAN, OF CLEVELAND, OHIO, ASSIGNOR TO THE JANDUS ELECTRICCOMPANY, OF SAME PLACE.

ELECTPlC-ARC LA P..

SPECIFICATION forming part of Letters Patent No. 571,974, dated November24, 1896.

Application filed May Z3, 1896. Serial No. 592,787. (No model To (t/wiz/om, t mfr/y concern:

Be it known that I, GEORGE R. LEAN, a resident of Cleveland, in thecounty of Cuyahoga and State of Ohio, have invented certain new anduseful Improvements in Electric-Arc Lamps; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an improvement in electric-arc lamps, one objectof the invention being to provide efficient means whereby to prevent thepounding of the lamps at starting through an excessive flow of currentand to steady77 the are when the lamp is burning, in case the voltageshould suddenly rise or fall, without the necessity for the use ofwasteful resistance in series with the lamp, which resistance asheretofore used in lamps in multiple-arc circuits has absorbed fromtwenty-five to forty per cent. of the energy.

A further object is to provide simple and efficient globe-holdin gdevices for electric-arc lamps.

A further object is to provide a carbonholder which shall be simple inconstruction, easy to manipulate, and which shall operate accurately tohold the carbon in proper position.

A further object is to provide simple and efficient means whereby tofacilitate the trimming of the lamp.

A further object is to improve various features of construction of anelectric-arc lamp and to so construct the lamp that it shall be accurateand noiseless in operation and effectual in all respects in theperformance of its functions.

iVith these objects in view the invention consists in the combination,in an electric-arc lamp, of a separating and feeding magnet, a holderconnected with the armature of said magnet, clutch-rings carried by saidholder and adapted to engage the carbon, and contact devices alsocarried by said holder and adapted to bear continuously against thecarbon 'for the purpose of conducting current thereto.

The invention also consists in a separating and feeding magnet forarc-lamps, having a conical core or pole-piece anda conical armature,one adapted to enter the other, and the faces of the two cones arrangedat an angle to each other; and the invention further consists in certainnovel features of construction and combinations and arrangements ofparts,as hereinafter set forth, and pointed out in the claims.

In the accompanying drawings, Figure I is a sectional view of anelectric-arc lamp embodying myimprovements. Figs. 2, 8, 4, and 5 areviews illustrating the holder for the inner or arc-inclosing globe.Figs. (3, 7, S, and D are detail views illustrating the combined clutchand contact devices. Figs. lO and Il are detail views of thelower-carbon holder. Figs. 12 and 13 are views illustratingmodiiications of the lower-carbon holder. Figs. 14, I5, and IG aredetail views illustrating the connections of the inner-globe andlower-carbon holder with the depending arms or uprights of the lamp.Fig. 17 is an enlarged view showing the closed coil anda portion of theprimary winding for the separating and feeding magnet. Fig. 1S is anenlarged detail View of the core and armature of the magnet.

A represents the iron frame or shell of the feeding and separatingmagnet, to the upper end of which a cap or casting l is fixed andyterminates in an upwardly-projectinghollow shank 2. An insulated screwis secured to the upper end of the shank 2 for the attachment of asuitable device by means of which to suspend the lamp.

IVithin the shell A the core or pole-piece A of the magnet is fixed anddepends partially through the same, said core or pole-piece being madewith a deep recess i in the form of a truncated cone for the receptionof the similarly-shaped upper portion 5 of the armature t3 of saidnmgnet. he core G is disposed within the shell A, and its lower endterminates within a chamber 7, formed by a cylindrical casting S, ofiron, fixed tothelowercnd of the shell A and forming, in effect, a partthereof. rihe chamber 7 is lined with sheetbrass or other suitablenon-magnetic material a, and against this lining the armature (i has aneat but sliding contact, said lining extending somewhat above the lowerend of the core A and inclosing the same. The cylinder or casting S thusconstitutes a dash-pot for the armature G and in which said armatureacts as a plunger.

The armature G is made with IOO a longitudinal opening lO, in the upperend of which a tube 11 is secured, said tube extending up through thecenter of the core or pole-piece A and terminating within the tubularshank 2 ot casting 1, its upper end being closed air-tight by means of acap 12. The helix 123 of the magnet is located within the shell, andalso located within said shell is a closed coil or conductor 1i. Thisclosed coil may be placed within the helix 13, or it may be wound aroundit, or the magnet may be provided with sectional windings, oneconstitutin g the workin g helix and another forming theconstantly-closed conductor. The armature of the magnet will beconnected with the upper carbon of the lamp in a manner which will behereinafter explained in (let-ail.

XV ith the constantly-closed coil or winding on the magnet, when thecircuit is closed through the lamp, current will be induced momentarilyin the closed or secondary winding in a reverse direction to thedirection of current through the working or prim ary coil or helix. Thecurrent thus induced in the closed or secondary coil will tend to weakenthe lifting-magnet and cause the arc to be drawn slowly, the secondarycurrent becoming gradually weakened until it ceases altogether and theare shall have been drawn to its t'ull length. `\Vhen the current is cutout of the lamp, there will be a secondary current induced in the closedor secondary coil in the same direction as the current through theworkin g helix. This will increase, for an instant, the strength of thethen-weakening magnet and thus cause the lamp to cease slowly instead etabruptly. These same aetions will occur in a less degree with any changeof voltage in the circuit or in case the arc should be momentarilyinterrupted from any cause, and thus maintain a constant and regulartlow of current at the are. The seeondary circuit being only momentarydoes not attect the magnet nor the light ot the lamp when the current issteady, but only when there is a vfluctuation in the circuit, and thushas the advantage ot' steadying the are and causing the lamp to burnvery steadily without much external. resistance, resulting in greatlyincreasing the ellicieney of the lamp without loss through a resistancesuch as heretofore used.

By the useof the closed secondary winding arc-lamps can be burned oncircuits et but little higher voltage than the voltage of the arc,instead of wasting a large amount of energy through a resistance,an dgreater steadin ess in the burning' of the lamp can be attained than ispossible when such resist-ance is employed. The use of the closedsecondary coil or winding enables lamps to be started and stoppedsmoothly without jumping and is part-icularly advantageous when a numberof lamps are burned in series on high-potential circuits. The reactiveeiiect produced by the closed secondary coil or winding can be used toadvantage on the shunt-magnets of lamps burning on constant-currentcircuits, the result being to prevent too sudden changes in strength ofthe shunt-magnet due to changes in the length ot the are or abnormalVfluctuations in the current.

The core of the separating and feeding magnet and its armaturecomprises, as above mentioned, two cones, one adapted to enter theother. It will be observed that the wall of the conical recesslin thecore ol the magnet is not parallel with the conical .tace ot" thearmature, but at an angle thereto. This is a matter of importance in:uljusting lamps to operate under certain conditions. lly changH ing`the angle ot the recessed cone to that ol.' the entering cone the pullof the magnet can be changed to any desired range, so that when an arcis drawn too long the armature will be drawn into a weaker portion ofthe magnetic circuit and thus cause the arc to be corrected. By thearrangement ol the cones above described the pull of the magnet can bemade te remain constant throughout a predetermined range of movement otthe armature by making the relative angles el' the lj'aces ol the twocones such that the air-gap at the points a 0/ will remain constantthrough this range. This can be accomplished by having the sum oi thedistance at the points .fzi'fji/ average the same throughout the range,other fluctuations in the strength of the magnet, such as the magneticgap at the entering-point of the armature, having been corrected. lt'the angle of the entering cone is less than the angle of the recessedcone, the pull ot the magnet will constantly grow weaker as the armatureis drawn into the recess, while the reverse ot these angles will producethe opposite result. Thus it will be seen that by careful arrangementolf the two cones a variety of results can be attained, such as a strongpull of the magnet l'or a portion ol:- the range oi movement of thearmature and a gradual decline at the .linish, or vice versa. l havel'ound it to be oli' advantage iu lamps burning in series onhigh-potential circuits to have the pull ol:- the magnet constantlydecreasing as the armature rises. This is exactly opposite to the pulloliI an ordi nary solenoid as is commonly used in arc-lamps. l have:found that 'for arc-lamps for use on one-hund red-and-ten-volt circuitsit is ot' advantage to have the magnet produce a unil'orm pull on thearmature throughout the ordinary litt ot the carbon and troni that pointrapidly weaken, so that in ease the lamp receives an abnormally highpotential the armature will not rise in proportion tothe increased voltage ol' the circuit and draw arc so long thatY it will, break and causethelamp to tlicker. ln this case the angles ot the laees ot the twocones would be such that a lamp burning at one hundred and ten voltswould draw an eightyvolt are, while the increase oi ten per cent. in thepotential ot' the lamp would not increase the are over Five per cent.

It is desirable to provide proper ventilation IOO ITO

for the windings 13 14:, and for this purpose openings 15 are made inthe armature-casing and through the lining a. For the same purpose theshell A is made with elongated slots 1G and the core or pole-piece ismade with holes 17, which communicate at one end with the conical recessand at the other end v.. h the interior of the casting 1, the shank 2 ofthe latter being made with slots or openings 1S. The sheet-metal casing19, whiehin closes the operatin g mechanism of the lamp, provided withair-vents 20. A free circulation of air will thus be permitted to keepthe inside parts of the magnets and the windings cool without allowing acurrent of air in the 'inclosed chamber 7, as the armature o constitutesa seal for said chamber below the openings 15.

An internally-serew-threaded collar 21 uepends from the cylindricalcasting 8 in line with an opening 22 in the bottoni of said casting. Anannular box or easing 215, having an opening in its top, is disposedbelow the easting S and provided with an internally-screwthreaded collar24 for the reception ot' the collar 21, depending from the casting 8.rlhe box or casing 23 is provided at its bottom edge with aninternally-screw-threaded annular iiange 25 for the reception ofscrew-threads on the periphery of a dish-shaped castin 2U, whichconstitutes the bottoni of said box or casing The parts 23 and 2G thusconstitute a receptacle or casing'` for inclosing the clutch and contactdevices for the upper carbon, and the said casting or bottom 2o isprovided centrally with a flattened enlargement 27, in which a hole ismade for the passage ot the upper carbon 28. A tube 29 is secured at itsupper end to the lower end ot the armature (i, so that its bore willaline with the bore of said armature. The tube is adapted 'to looselyreceive the upper carbon 28 and passes freely through the collar 2l,terminating in the box or receptacle 23, preferably at or near itscenter, and carrying the clutch and contact devices for the uppercarbon. ln constructing these clutch and Contact devices ahorizontally-disposed plate SO is secured to the tube 29 at a point nearthe lower end ot' the same, and from the periphery of this plate acircular casing 31 depends, the lower end oi' which is contracted ormade with an inwardlyprojecting flange .52, said casing 'forming anopen-bottom clutch-pan, the rings 323, constituting said clutch, beingadapted to rest on the inclined flange of the clutch-pan and against thecarbon-rod when the lamp in operation, as shown in Figs. 1, t5, aut- .l.Vllhe clutch-rings are made with roughencd peripheral grooves whereby tocause them to properly engage the carbon-rod without d anger ofslipping, and said clutch-rin are disposed within a slotted carrier 3l,supported from the plate SO by means of screws 35, the upper ends ofwhich pass loosely through said plate, and the carrier is provided inits top with a hole 36a for the reception of the lower extremity ol thetube 29. ln Fig. 8 of the drawi three clutch-rings are shown, and theyare maintained in proper position by means ol a horizontally-disposedrin g 3G passing through them. A series of contact-rings 53T,constituting the contact-brush for conducting current to the uppercarbon, are mounted in the slotted carrier Si and alternate with theclutch-rings 33, the horizontal ring also passing through saidcontactrlngs and serving to constantly support the saine in contact withthe carbon. rlhe contact-rin JST have smooth peripheral grooves toconform to the contour ot the carbon and are made equal in diameter tothat of the clutch-rings, but with thicker or wider walls, so that theywill be supported by the ring 230 somewhat higher than the clutch-rings.

llhen current is passing through the lamp, the position of the clutchdevices will be as shown in Figs. 1, G, and 9, the clutch-pan andslotted carrier being elevated above the bottoni 2G of the casing whichincloses them, and the clutch-rin gs being clamped or wedged between thecarbon-rod and the inclined flange 32. rihe rings 37 bearagainst thecarbon-rod and are maintained in proper contact herewith by means of aweight 3S, placed upon them.

lt is obvious that when the feeding oi the upper carbon becomesnecessary the clutchpan and slotted carrier will niove downwardly untilthe carrier engages the enlargementl27 of the casting 2G, when it willbe caused to move upwardly on the tube 29, as shown in Fig. 7. Theclutch-rings will at the saine time engage the enlargement 27 of casting20 and be thus caused to rise slightly, so as to loosen their grip onthe carbon-rod and permit the latter to feed. The contactrings 37, beingmore elevated in the carrier 3l thanl the clutch-rings 33, as abovecxplained, they will not come in contact with the casting 2U when theclutch-pan and carrier are lowered, and hence the engagement ot thecontact-rings with the upper carbon will be constant under allconditions.

The box or casing which incloses the clutch and contact devices, is madewith a laterally-projecting annular flange 39, beneath which a ring O isdisposed and insulated thercfrom, a spring-cushion 4:1, for the outerglobe i2, and sheets a3, oli' insulating material, being located betweensaid `flange 30 and ring it). 'lhe ring l() is made with pcripheralsegmental tlauges at-1, adapted to receive and support similar segmentalflanges a5, projecting inwardly from an annular plate or ring at), theupper face of which has an air-tight bearing against the spring-cushion11, or, more strictly speaking, against the lower insulating-sheet a3,on which said cushion rests. The plate or ring -16 is provided withadepending peripheral `flange 47, the lower edge ot which is curvedinwardly, as at #18, and l'orms a scat for packing-ring all, on whichthe shoulder 50 at the upper edge oi lOC/ the outer globe regte, edge ofsaid globe ha 'in 'the under face ot' the annuh plateor ring` ,t(

The ring l() is made with r threaded bosses J t Y A r a eloFie lit aganrt i so as the annular ie with the rpaeee beil l i D A to give the`globe a one-sixth tu" bring the eegnientai ilanges; oi' plate or rin;DAY(3 in lh tween the seig'inentali" e innato The g3g-lobe ii ean then land will he be lor-ferreaY Support-ed by the ehaiin' 5S.

The rode 52 Support at their lower endf a yoke or braeket 5i, and thelatter earrioev the holder for the inner or are-inelofsing,` globe 55and the holder for the lower Carbon ot the lanip. ln order that" theare-inelosing globe and the lower-earlmn nolder ean be readily renioved,the yoke or braeke; 5l, which earries them, is eonneeted with the rode`or uprights 52 in the following, `inanner: ilaeh end et the voke orbraeket 5t is; inade with a hollow bose or enhtrgeinent 56, open at on oeide, as at 5T, and haring an internal Shoulder 5S at its upper end andluge 5t) GO, project-ing' towa d eaeh other in the opening` 57. Thelower end of eaeh rod or upright 52 is provided with shank (il, havingtwo enlargeniento o2 (Si), adapted to enter the hollow boseee 5G and beprevented freni eeeape therefroin by the luge 50 GO, the en argeinent o2on the shank Jl being,` adapted to receive the shoulder at the upper endoi the bese. The yoke or bracket 5i ifi eoni eeted in the saine mannerto both rode or arias 553, exeept that the lateral opening 57 of onebose or enlargement tis at oppoeite side thereof from the lateralopeningjr 5T et the other bees or enlargement. Thus it will be @een thatbj.'v raieing the yoke or braeket 5i ani' then turningl it slightly itcan be rea/.liliv detaehed trein the rods or etaudarde 5i?.

The yoke or bracket 5ft is provided eentrally between its ende with aeireular enlargement or base Git, havinigI external Serowthreads G5 andan annnlarreeess Gti, in which latter a peeking-ring U7, oi aebeetos orother Suitable material, is plaeed and adapted to reeeive the lowerVflanged edge el the inner or are-inelosing globe 55, the latter beingprovided with a valved eovero1l through whieh the upper earbon paeses.fr eollar or eap o8 is adapted to isere v on the enlargement or baselj-t, and made with an inwardly-projeeting` enrved .ilange or lip titl,within whieh and above the upper edge oi the reeeseed portion of theenlargement or base (ift an ann'ular eoiled si ring TO disposed. Thelower hanged end oi the inner globo havingbeen seated in the reeessedbase Git, the eap or eol- Oholdili the ilangie oi' the f zlobe i its watin the base oi olf the l the epiingr beine' l'oreed down toward Saidbasse ae well an be'i g; eonl1raete 'l, zu; ehe in in Figs. -t and itirs aip'iarent that by unserer-Jing the eap or Collar (3S the annulareoiled' Spring 7 will be permitted. to ex,- pand, as :shown in lfige. Land and thin; perinit the removal oi the inner globe.

The base olf the inner-globe holdei iri made withV an opening` Tl. VForthe aoeoininodation t lo\.\er-earlion holdii 72 f pering` enlargement77, adnp ,ed to engage the tapering wall ot the i pper poi tion 73 oli'the opening 7l. i `ro1n this eonfstrnetion it will be Seen that when thennt is screwed up the lower Carbon will. be tightly elainped within thesplit ,ileevi T5.

inetead et' the eonastruetion ol hold er lor the lower earbon abovedeeoribed, that Shown in l2 might be en'iployed. in this torni. theinner-globe holder if; niade with a ta'xperine Screw-threaded iioeketi'Tf-3 tor the reeeption ol;I the tapering Serew-threaded lower end Tf)ol.' the split Sleeve or socket-piece S0. ji posit Si is inserted in aSocket in the base ot and projeete up rardly vithin the sleeve or:soeketipieee SO, terniiimting` at .itev upper end in a head S2, whichsiervos as a support :tor the lower Carbon.

In the forni of carbon-holder shown in i3 the base oiifi niade with adeep Socket Sil, havingl a tapering` eerew-threaded portionr at Vite lover end i'or the tapering serew-threaded portion Si oi' the Split Sleeveor emifketpiece 85, the diameter olf the see-'kot Si) above theSerewdhreaded portion beine; aul'iieientl)v greater than the externaldiameter ot' the sleeve or ooeket-pieee S5 'to permit the expansion oithe latter for the insertion oi the earbon. fr recessed. trarne SGeneirelesl the box or easing; 233 and ieprovided with Si ripe` S7 ofiniea, on which a `wire of low resistance Srl wound. rilheporiitiveleading-in wire 'o oithe lainp is Connected with the inae'net traine orShell, lfrom which it paoseo lo the elut(:li-pan and carrier andeontaet-rings to the upper Carbon, then to the lower Carbon, and thenthmngh the voke or b laeket 5t and rods 52 to the ringgtO. ihefieg'inental flanges ot' the ring' -ltl being in eleetrieal Contact withthe segmental .flanges oiI the ringorplatolti, eu rrentwill pass freinthe former to the latter and then. through a ewiteh Si), then throughthe low resistaiufe SS, and 'linally out through 'ihufi it will be seenthat globe is hav/ered7 as above exthe ininnS-wire c. when the outer ihe IIO plained, the circuit will be opened on ae count of thedisengagement of the rings 40 and 4G, and it will therefore beimpossible for the trimmer to receive a shock while trimming the lamp,even though he should forget to turn the switch.

Various changes might be made in the details of construction of myinvention without departing from the spirit thereof or limiting itsscope, and hence I do not wish to limit myself to the precise detailsherein set forth.

IIaving fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In an are-lamp, the combination with a magnet-core and armature, of ahelix encircling said core and included in series with the earbons ofthe lamp, a constantly-closed conductor also encircling1 said core,whereby to effect the gradual starting and stoppin g of the lamp, and aclutch supported by said armature, substantially as set forth.

2. In an arc-lamp, the combination with the pole-piece of a magnet, anarmature arc-starting mechanism and connections between the arc-startingmechanism and the magnet, of a helix encircling said pole-piece andarmature and included in the lamp-circuit, and a constantly-closedconductor also encircling the pole-piece and armature, whereby to effectthe gradual starting and stoppin g of the lamp, substantially as setforth.

A separating and feeding magnet for an electric-are lamp having aconical pole-piece and a conical armature, the adjacent conical faces ofsaid pole-piece and armature being disposedpat an angle to each other,substantially as set forth.

4. A separating and feeding magnet for an electric-are lamp having aconical pole-piece, and a conical armature, one adapted to enter theother and the faces of the two cones arranged at an angle to each other,substantially as set forth.

5. In an electric-are lamp, the combination with suitable framework anda clutch, of a separating and feeding magnet having a conical recess inits pole-piece or core, an armature having a conical end to enter saidconical recess, the conical face of the armature being disposed at anangle to the face of the conical recess in the pele-piece or core andconnections between said armature and clutch,substantially as set forth.

G. In an arc-lamp, the combination with the separating and feedingmagnet having a hollow core and a hollow armature, of a tube attached toand communicating with the armature and passing loosely through saidhollow core, a tube depending from the armature and clutch devicesconnected with the lastmentioned tube, substantially as set forth.

7. In anelectrie-arc lamp, the combination with a magnet-shell, of ahollow cap or casting fixed to the upper end thereof, a polepiecesecured within said shell, a hollow arn mature also disposed within theshell and constituting the plunger of a dash-pot formed at the lower endof the shell, a tube connected with the upper ond of the armature andterminating within said hollow cap or casting, a cap closing the upperend of said tube, a tube depending from said armature, and clutchdevices connected with said last-inentioned tube, substantially as setforth.

S. In an electric-arc lamp, the combination with a magnet-shell and acylindrical casting secured within the lower end thereof, of a coredepending' within said shell, a helix within the shell, a lining in saidcylindrical casting said lining inelosing the lower end of the core, anarmature disposed within the shell and helix and having a sliding fit inthe cylindrical casting, a tube depending from the armature and clutchdevices carried by said tube, substantially as set forth.

O. In an arc-lamp, the combination with a carrier, of clutch-rings forthe upper carbon, mounted therein, contact-rings also mounted in saidcarrier, and means for operating the elutehrings without moving thecontactrings from the carbon, substantially as set forth.

lO. In an arc-lamp, the combination with a clutch-pan and a carriermounted therein, of a set of clutch-rings mounted in the carrier andadapted to engage the upper carbon, means for movin g said clutch-ringste release the carbon, and contact-rings also mounted in said carrierand disposed in a higher plane than the clutch-rin gs so that they willnot be affected by the operation of said clutch-rin gs, substantially asset forth.

ll. In an arc-lamp, the combination with a slotted carrier adapted topermit the passage of the upper carbon through it, of a series ofclutch-rings having roughened peripheral grooves, mounted in saidcarrier, a series oi' contact-rings mounted in said carrier andalternating with the clutch-rings, said contactrings being of the samediameter as the clutch-rings but having thicker or wider walls and asupporting-ring passing through all of said clutch and contact rings,substantially as set forth.

l2. In an are-lamp, the combination with the armature of the separatingand feeding magnet, of a clutch pan or receptacle connected therewith, avertically-movable slotted carrier supported in said pan or receptacle7clutch-rings mounted in said carrier, a horizontal ring passing throughsaid clutchrings, and a device adapted to be engaged by said carrier andclutch rings, whereby to cause them to move upwardly and the carbon tofeed, substantially as set forth.

I3. In an arc-lamp, the combination with the separating and feedingmagnet and its armature, of a tube depending from said armature, a platesecured to said tube near its lower end, a easing depending from saidplate and having an inclined flange at its lower end, avertically-movable carrier within said casing and having a hole to'receive the lower TOO IZO

end of said tube, Clutch-rings mounted on Said carrier and adapted tobear againet Said inclined flange and the Carbon-rod, a horizontal ringpassing through the Clutch-rings, aiu a deyiee to be engaged by saideluteh-ringe` and Carrier, eubstai'rtially ae set forth.

lit. ln au are-lamp, the Combination with a inab iet-Shell, aeylindrieal Casting eeeurerY thereto and an armature withinv said Shell,of a box er easing secured to Said eylindriea Casting, a removablebottoni for Said boxA or eaeing an d having an. opening for the passageof the Carbon, a tube eeeured to the ra'niature and /aeaiug .into saidook or easing, a elutehpar Seeured to Said tube, a earrier in. saideluteh-pztn, el etch-rings in said earrier and pan and adapted to engagethe bottoni of the box or easing to permit the carbon to feed, andahorizontal ring passing through. said elutelrrings, substantially as Setforth.

15. ln an areelainip, the Combination with the framework, of a rin gremovably attaehed to Said framework, having a flange adapted to reeeiyeand Support a globe and a cushion aga-inst which Said ring bears,subetantially as set forth.

1G. ln an are-lamp the combination with the :framework of a ringSupported thereby, a spring-'cushion above said ring, an annular plateadapted to b removablyseoured to Said ring and bear aga' rst SaidSpring-euehion, a eured flange depending from. Said annular plate, a;globe, and a paolung-r'ng between the "ieri )heral flange of the flo .nt

l. o 1 21 Y eurved flange on the annum platte. Sube' tially as Setforth.

17. ln an are-lamp, the the framework, of a ring f insulated therefrom,a gl Combination with eeured there' o a nl e-holder reino'w ablyconnected with said ring, s, lower-earbon holder, eleetriezl eonneetirnsbetween Said carbon-holder and i g, d ring` and globerolde eonetitutingpart of the eireuit through the lamp, so that wh i the globe and itSholder are removed, the open-eireuited, Subetantially as Set lS. in anmelanin, the eonl`V for 1h. i iinai ion with the frainewor, and aninsulated ring eupi Said eeen red to ported thereby, Y ring, a yoke orb"-iel.:et renioi'ab y Y T 1. thelowerende et.l drone, and aiMinoli-,filiale holder and lower-t .rben helder s of 'roda deneni ngfr.-

upported by Said yoke or braeket, sul` stantially forth.

19. ln au are-lamp, the Combination with the fre-newl rk, of twodepending ro sup ported 'thereby and insulated therefron'i, buttons orenlargements; on the lor-:er ends ol: Said rods, a yoke or br: eket,hollow bosses at the ende of uaid yoke r bracket, luge projecting intosaid openings, and internal Shoulders at L' the recepthe upper ende oSaid bosses lo? on the et forth.

tion of the buttons or enlargeine'i 20. A globe-hold er comprising abase,an addepending rods, substantially ae justable eap thereon andaspring-ring within said Cap and adapted to be foreed ag ailst the globeby said ap, substantially ef the forth. l. globe-holdereoinprieingabaee,an adi table cap thereon, and an annular eoiled Si iV 'adapted tobe loreed by Said cap, ag: et the ilange oit' the globe whereby to foreethe latter againet te uit, snbsiant ially as; eetforth.

fr globe-hohlereoniprieingabaee,an adjustable can thereon, said eenharing an inwardly-Curved flange, and an elastic ring i dapted to beforeed against the flange or shoulder on the globe by .said curved`iange on the eap, Substantially as set forth.

l. A 'l'lobeeholder eoinprieing a base haring external e row-tl;reads,a` eap adapted to eerew on said baan, said eap having an in-ywzudly-curved annular flange at its upper edge, andan annulareoiledSpringwithii Said eur-ved annular flange, Snbutaiitially z s; set forth.

2l. A gloljle--nlder .voinjyn'ieing a recessed w base, a paeking-di ikthereon, a serew- :an on said base, e l ea) h at threaded projection, adevice within Said eap adapter to be foreed by the cap against theflange of a globo whereby lo clamp the latter to the bano, and a Splitsleeve passi ng through the hele in the bane and adapted io receive;Carbon, said eleeye li;..\.'ii1ga tapering portion to bear against thetapering wall of the hole in the balie and a nut to Sereni in theaerewthreaded 1portion of eaidhole in ilxebaee, sul stantially as setfor h.

2G. The eouibinatiini in an are-lamp, ot a Sel'laraiing an'l 'eenlingmagnet and the earbons, a frame, stripe of iiuiulating materialSupported by riale f 'ein 5, and a low r .\eistanoe found on said briigrs and ineluded in eireuit with the separa ing and feeding magnet andthe f.-irl ona, Suben `utiaflly set forth,

27. ln an are-lamp, the combination with the framework and a lowreeietanee, et' an insulated ring sumlorted by the framework, aglobe-holder -en'ioi'ab yattaehed to said ring, l .rer-ea rbon holderinelueed in eireuiIV with the Sa'd ring' and globe-holder, and a ewitehbetween said globe-holder and resistance, Substantially as set forth.

f l have signed prefs.

GEORGE R. la 41.3K.

IOO

